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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.dialer.util;
     18 
     19 import android.Manifest.permission;
     20 import android.content.BroadcastReceiver;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.IntentFilter;
     24 import android.content.pm.PackageManager;
     25 import android.support.v4.content.ContextCompat;
     26 import android.support.v4.content.LocalBroadcastManager;
     27 import com.android.dialer.common.LogUtil;
     28 
     29 /** Utility class to help with runtime permissions. */
     30 public class PermissionsUtil {
     31 
     32   private static final String PERMISSION_PREFERENCE = "dialer_permissions";
     33   private static final String CEQUINT_PERMISSION = "com.cequint.ecid.CALLER_ID_LOOKUP";
     34 
     35   public static boolean hasPhonePermissions(Context context) {
     36     return hasPermission(context, permission.CALL_PHONE);
     37   }
     38 
     39   public static boolean hasContactsReadPermissions(Context context) {
     40     return hasPermission(context, permission.READ_CONTACTS);
     41   }
     42 
     43   public static boolean hasLocationPermissions(Context context) {
     44     return hasPermission(context, permission.ACCESS_FINE_LOCATION);
     45   }
     46 
     47   public static boolean hasCameraPermissions(Context context) {
     48     return hasPermission(context, permission.CAMERA);
     49   }
     50 
     51   public static boolean hasMicrophonePermissions(Context context) {
     52     return hasPermission(context, permission.RECORD_AUDIO);
     53   }
     54 
     55   public static boolean hasCallLogReadPermissions(Context context) {
     56     return hasPermission(context, permission.READ_CALL_LOG);
     57   }
     58 
     59   public static boolean hasCallLogWritePermissions(Context context) {
     60     return hasPermission(context, permission.WRITE_CALL_LOG);
     61   }
     62 
     63   public static boolean hasCequintPermissions(Context context) {
     64     return hasPermission(context, CEQUINT_PERMISSION);
     65   }
     66 
     67   public static boolean hasReadVoicemailPermissions(Context context) {
     68     return hasPermission(context, permission.READ_VOICEMAIL);
     69   }
     70 
     71   public static boolean hasWriteVoicemailPermissions(Context context) {
     72     return hasPermission(context, permission.WRITE_VOICEMAIL);
     73   }
     74 
     75   public static boolean hasAddVoicemailPermissions(Context context) {
     76     return hasPermission(context, permission.ADD_VOICEMAIL);
     77   }
     78 
     79   public static boolean hasPermission(Context context, String permission) {
     80     return ContextCompat.checkSelfPermission(context, permission)
     81         == PackageManager.PERMISSION_GRANTED;
     82   }
     83 
     84   /**
     85    * Checks {@link android.content.SharedPreferences} if a permission has been requested before.
     86    *
     87    * <p>It is important to note that this method only works if you call {@link
     88    * PermissionsUtil#permissionRequested(Context, String)} in {@link
     89    * android.app.Activity#onRequestPermissionsResult(int, String[], int[])}.
     90    */
     91   public static boolean isFirstRequest(Context context, String permission) {
     92     return context
     93         .getSharedPreferences(PERMISSION_PREFERENCE, Context.MODE_PRIVATE)
     94         .getBoolean(permission, true);
     95   }
     96 
     97   /**
     98    * Records in {@link android.content.SharedPreferences} that the specified permission has been
     99    * requested at least once.
    100    *
    101    * <p>This method should be called in {@link android.app.Activity#onRequestPermissionsResult(int,
    102    * String[], int[])}.
    103    */
    104   public static void permissionRequested(Context context, String permission) {
    105     context
    106         .getSharedPreferences(PERMISSION_PREFERENCE, Context.MODE_PRIVATE)
    107         .edit()
    108         .putBoolean(permission, false)
    109         .apply();
    110   }
    111 
    112   /**
    113    * Rudimentary methods wrapping the use of a LocalBroadcastManager to simplify the process of
    114    * notifying other classes when a particular fragment is notified that a permission is granted.
    115    *
    116    * <p>To be notified when a permission has been granted, create a new broadcast receiver and
    117    * register it using {@link #registerPermissionReceiver(Context, BroadcastReceiver, String)}
    118    *
    119    * <p>E.g.
    120    *
    121    * <p>final BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void
    122    * onReceive(Context context, Intent intent) { refreshContactsView(); } }
    123    *
    124    * <p>PermissionsUtil.registerPermissionReceiver(getActivity(), receiver, READ_CONTACTS);
    125    *
    126    * <p>If you register to listen for multiple permissions, you can identify which permission was
    127    * granted by inspecting {@link Intent#getAction()}.
    128    *
    129    * <p>In the fragment that requests for the permission, be sure to call {@link
    130    * #notifyPermissionGranted(Context, String)} when the permission is granted so that any
    131    * interested listeners are notified of the change.
    132    */
    133   public static void registerPermissionReceiver(
    134       Context context, BroadcastReceiver receiver, String permission) {
    135     LogUtil.i("PermissionsUtil.registerPermissionReceiver", permission);
    136     final IntentFilter filter = new IntentFilter(permission);
    137     LocalBroadcastManager.getInstance(context).registerReceiver(receiver, filter);
    138   }
    139 
    140   public static void unregisterPermissionReceiver(Context context, BroadcastReceiver receiver) {
    141     LogUtil.i("PermissionsUtil.unregisterPermissionReceiver", null);
    142     LocalBroadcastManager.getInstance(context).unregisterReceiver(receiver);
    143   }
    144 
    145   public static void notifyPermissionGranted(Context context, String permission) {
    146     LogUtil.i("PermissionsUtil.notifyPermissionGranted", permission);
    147     final Intent intent = new Intent(permission);
    148     LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
    149   }
    150 }
    151